| http://www.w3.org/ns/prov#value | - Search Health Information InfluenzaAlso listed as: FluSigns and SymptomsCausesRisk FactorsDiagnosis Preventive CareTreatment ApproachOther ConsiderationsSupporting ResearchInfluenza, or flu, is a caused by a virus infecting the respiratory system, meaning your nose, throat, bronchial tubes, and lungs.
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